Finally found the picture I promised a few days ago. Sorry for the delay.
The link is a 10-32 threaded rod if memory serves. All the hardware comes from large scale RC car stuff as was suggested by others. I have things set up so the position sensor never reaches absolute travel limit. If I run the flap motor to full travel in either direction and then disconnect the link arm I can get just a bit more extension or retraction in the position sensor. I made a cardboard bracket as a template for fitting and then created the real thing from some spare .032. I have it set up so I can remove two screws from behind the baggage compartment wall and remove the bracket. Everything fits behind the cockpit side wall.